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The tech sector is in the middle of a global reckoning, as investors baulk at pouring money into unproven start-ups and digital giants brace for the double whammy of an economic slowdown and new rules to rein in their power.

But entrepreneurialism and innovation are still unstoppable forces. There remain great fortunes to be made from spying an opportunity, getting in early on a new trend, or backing the right disrupter.